Circular tanks are lighter in weight and stronger for their volume then other shapes. Using them with a pressurized sytem then goes well with airstream engineering esthetic. Only spheres provide a more efficient shape. Hot water tanks are cylinders for good reasons. I believe pressurized system was dropped because of cost. A good air pump costs a lot more than a good water pump. A good air pump for domestic water use must be able to compress air without spitting lubricate into the water tank. This is not an easy thing to do economically. --- Jim Dunmyer <[EMAIL PROTECTED]> wrote: > Bill, > There's a couple or 3 advantages to the newer water > systems with a > demand pump: > > 1. The tank can be lighter, larger, and more > flexible in shape. IE: a > large, rectangular, flat tank can be designed to fit > under a low couch > or any other available space. The pressurized system > demands a heavy > steel tank that's round to handle the pressure. > 2. I suspect that the air compressors used in the > pressurized systems > are somewhat more problematic than the demand pumps, > but have no data to > support that. > > > The main thing is #1 above; it's easy to design and > build a 30-gallon > (or larger) tank when it can be any shape that's > needed to fill whatever > space is available. > > The only advantage that I see to a pressurized > system is that the > compressor/pump doesn't have to run every time you > need a cup or 2 of > water. That's not a big deal to me. > > <<Jim>> > > > Bill Scott wrote: > > > > Excellent reply Don Horn. My 61 Bambi has an air > pressure water system > > and it works so well, I wonder why the system was > changed to on demand. > > > > So,.........what's not to like??? > > > > > -- > > > <<http://www.oldengine.org/members/jdunmyer>> > > <<[EMAIL PROTECTED]>> > <<lower SE Michigan, > USA>> > > <<mailto:[EMAIL PROTECTED]>> > > > > To unsubscribe or to change to a daily Digest, > please go to > http://www.airstream.net/vaclist/listoffice.html > > If replying back to this message, please delete all > the unnecessary original > text from your reply. > > __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ To unsubscribe or to change to a daily Digest, please go to http://www.airstream.net/vaclist/listoffice.html If replying back to this message, please delete all the unnecessary original text from your reply.
